Varsha had some 20-cents & 50-cents coins. 7/8 of the coins were 20-cent coins & the rest were 50-cents.
After Varsha had spent $72.50 worth of 50-cent coins and 5/7 of the 20-cent coins, she had 2/7 of the coins left.
Find the total amount of money Varsha left.

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$72.50 (of 50cts) and 5/7 of 20cts spent.
72.50 / 0.50 = 145 (50cts) spent.
Given that 2/7 of the total coins were left and initial total coins is 8p, we split 1p of these into 7 equal units (u); hence, giving (8 x 7) = 56u (initial total.